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Maths-

General

Easy

Question

The Population of cities A and B are $2.6 cross times 10 to the power of 5$ and 1560,000respectively. The population of city C is twice the population of city B. The population of city C is how many times the population of city A ?

hint Hint:

Write the population of cities as the same powers of base 10 and then
compare.

The correct answer is: 20

Complete step by step solution:
Population of city A = $2.6 cross times 10 to the power of 5$
Population of city B = 1560000 = $15.6 cross times 10 to the power of 5$
Population of city C = 2 $cross times$ 1560000 = $2 cross times 15.6 cross times 10 to the power of 5$
On dividing population of city C by population of city A, we have $fraction numerator 2 cross times 15.6 cross times 10 to the power of 5 over denominator 2.6 cross times 10 to the power of 5 end fraction$
On cancelling on numerator and denominator, we have
$not stretchy rightwards double arrow fraction numerator 2 cross times 15.6 over denominator 2.6 end fraction equals 12$
Hence the population of city C is 12 times the population of city A.

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